It's not Politically Correct to mention that. I've been interviewed several times about computer security and the interviewer inevitably asks what people can do to make their computing more secure. When I mention something that actually helps ("Don't run Windows, for pity's sake!") that part is always cut out of the interview in favour of some other "expert" who mouthes platitudes about keeping your anti-virus software up-to-date and not opening "unknown" e-mails. Sigh.